Jarring tool



Jan. 19, .1932. s. M. AKEYsoN J ARRING TOOL Filed March 27, 1929Patented Jan. 19, 1932 SWAN M. AKYSON, OF LONG BEACH, CALIFORNIA JARRINGTOOL Application :ned Haren 27, 192e. serial no. 350,277.

This invention relates to a arring tool particularly useful in thedrilling of wells and for the removal of bits, or other tools, whichbecome fastened in the hole during the drilling of the well.

An object of my invention is to provide a jarring tool which can bereadily coupled to the tool secured in the hole'and which will strikeagainst the tool to assist in its removal. v

Still another object is to provide a jarring tool which is operable uponmoving the drill pipe longitudinally, thus relieving the torque strainon the pipe which is present 1n the jarring tools heretofore in use', l

Other objects, advantages, and features of invention may appear from theaccompanying drawings, the Subjoinedv detailed description, and theappended claims.

In the drawings:

Figure 1 is a longitudinal sectional view of my jarring tool.

Figure 2 is a longitudinal sectional view of the jarring tool inposition to strike the blow against the tool. n

Figure 3 is a fragmentary longitudinal sectional view of a slightlymodiied form of tool.

Referring more particularly to the drawings, the numeral 1 indicates thecylindrical body or barrel of the tool to the upper end of which a tooljoint 2 is secured. A post 3 extends into the body 1 through the lowerend thereof and this post is adapted to be secured to the bit or othertool. Ahead 4 is formed on'the upper end of the post and this headaccurately vfits the inner wall of the body 1. 1

A packing ring 5 is provided in the body and presses against the post 3and a plurality of ducts 6 extend from the interior of the body 1 to therear of the ring 5. Thus any iuid pressure in the body will tend topress the packing ring tightly around thel post 3 and will preventleakage of the fluid from the outside past the post, and thence into thebod Aybumper bar 7 screws into the top of the head 4 and this bar isprovided with an enlarged ring 8, the purpose of which will be suddenlyreleased which further described. A plurality of springfingers 9 aremounted upon a sleeve 10 which sleeve is slidably mounted in the body l.The spring .fingers 9 are each provided with an enlarged lug 11, saidlugs acting as a stop for the ring 8, as will be further described. Arubber compression ring 12 sets upon a metal collar 13, said collarbeing limited in its downward movement by a suitable shoulder 14 formedon the inside of the barrel 1.

The joint 2 is provided with a square recess 15 in the bottom thereofand the bar 7 is provided with a squared upper end 16 which fits intothe recess 15 and when thesemembers are thus coupled, as shown in Figurel, the post 3 65 can be screwed into or out of the lost tool.

The operation of my tool is as follows: The tool is lowered into thewell in the position' shown in Figure 1, and the post 3 is screwed intothe lost tool but the screwed con- To nection need not be very tight.The drill pipe is secured to the joint 2 and is now pulled upwardly,causing the fingers 9 to be pulled downwardly to the position shown inFigure 2. An upward strain is now placed upon the drill pipe and thiscauses the rubber ring 12 to compress. The lugs 11 then move below themetal collar 13 which permits them to expand outwardly and the bumperbar 7 is permits the body l to move rapidly upwardly and strike againstthe head 4, thus imparting a jar to the tool.

The drill pipe is now lowered and the ring 8 engages the bottom of thelugs 11, thus pushing the fingers 9 upwardly to the posi- S5 tion shownin Figure 1 and since there is no v restriction to the.outward expansionof the fingers the ring 8 will readily pass the lugs 11 and the movementpreviously recited is repeated. j y

In the modified form shown in Figure 3 the cylindrical barrel 17 isprovided with the post 18, identical in construction to the post 3. Thehead 19 is formed on the post and the bumper bar 20 rises from the head19. A tool joint 21 is secured to the upper end of the barrel 17. Ametal collar 22 is slidably mounted in the barrel 17 and a plurality ofspring fingers 23 are adapted to bear upon the ring 22 and these fingersare backed by a 100 rubber ring 24. Lugs 25 are formed on each of thespring fingers 23 for the purpose of engaging the enlarged ring 26 onthe top of the bumper bar 20. The action of the bumper bar in passingthe lugs 25 is identical to that previously described.

On the upward movement of the bar 20 the enlarged ring 26 engages thelugs 25, thus pushing the spring fingers and the rubber backing ringupwardly into the slightly enlarged space 27. This permits the fingersto expand readily and the enlarged ring 26 is allowed to pass withlittle effort.

Having described my invention, I claim:

1. A jarring tool comprising a barrel, a post extending into the barreland slidable therein, packing means in the barrel around the post, ahead on the post within the barrel, a bumper bar rising from the head,an enlarged ring on the bumper bar, a plurality of spring fingers, asleeve to which said fingers are secured, lugs on the fingers adapted toengage said ring, a rubber ring in the barrel, and a metal collar uponWhichthe rubber ring rests, said lugs on the spring fingers beingadapted to be positioned opposite the metal collar before the rubberring is compressed, whereby the lugs are permitted to move below themetal collar and release the enlarged ring on the bumper bar.

2. A jarring tool comprising a barrel, a post extending into the barrel,and slidable therein, packing means in the barrel around the post, ahead on the post within the barrel, bumper bar rising from the head, anenlarged ring on the bumper bar, a plurality of spring fingers, a sleeveto which said fingers are secured, lugs on the fingers adapted to engagesaid ring, a rubber ring in the barrel, and a metal collar upon whichthe rubber ring rests, said lugs on the spring fingers being adapted tobe positioned opposite the metal collar before the rubber ring iscompressed, whereby the lugs are permitted to move below the metalcollar and release the enlarged ring on the bumper bar, and meansadjustably mounting the bumper bar in said head.

3. A jarring tool Comprising a barrel, a post extending into the barreland slidable therein, a head on the post Within the barrel, a bumper barrising `from the head, an enlarged ring on the bumper bar, a pluralityof 'spring fingers, means securing said spring fingers together, lugs onthe fingers adapted to engage said ring, a rubber compression ring inthe barrel, means securing said rubber ring in the barrel, meansrestraining the outward movement of said spring lingers before therubber ring is oonlpressed, said fingers being adapted to spreadoutwardly to release the ring on the bumper bar when the rubber ring iscompressed.

In testimony whereof, l affix my signature.

SWAN M. AKEY'SON.

